CN201982088U - Near-wellbore region shearing stimulator with multiple-stage cylindrical shell - Google Patents
Near-wellbore region shearing stimulator with multiple-stage cylindrical shell Download PDFInfo
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- CN201982088U CN201982088U CN201020678955XU CN201020678955U CN201982088U CN 201982088 U CN201982088 U CN 201982088U CN 201020678955X U CN201020678955X U CN 201020678955XU CN 201020678955 U CN201020678955 U CN 201020678955U CN 201982088 U CN201982088 U CN 201982088U
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Abstract
The utility model provides a near-wellbore region shearing stimulator with a multiple-stage cylindrical shell. The near-wellbore region shearing stimulator comprises a multiple-stage cylindrical shell which is composed of at least two cylindrical shells with different diameters. The multiple-stage cylindrical shell is provided with a seal cover A and a seal cover B. The seal cover A is provided at an end of a first stage of cylindrical shell. The seal cover A and the seal cover B are respectively provided with a sealed pipeline joint a and a sealed pipeline joint b. The first stage of cylindrical shell is internally provided with an annular cylinder which is fitted with the first stage of cylindrical shell through interference fit. A concrete sand member is provided between a lower surface of the annular cylinder and the seal cover B. The concrete sand member is provided with a cylindrical hole which is communicated with an inner chamber of the annular cylinder. The shearing stimulator provided by the utility model can be widely applied in a chemical flooding recovery rate improvement technique of oil field.
Description
Technical field
The utility model relates to a kind of near wellbore zone and shears analogue means, belongs to the near wellbore zone of annotating in the lab simulation technology that improves recovery ratio in the poly-field in the oil field and shears analogue means.
Background technology
Polymer flooding has become and has improved one of important important raising recovery efficiency technique of recovery ratio in the oilfield development process.Annotating the poly-design for scheme stage, the polymer solution performance plays crucial effects to annotating poly-schematic design, what relate in the schematic design all should be the performance of the solution under the actual reservoir condition about the parameter of polymer solution performance, for the viscosity under these actual reservoir conditions, parameters such as rheological characteristic, the approach that obtains at present is divided into the scene and obtains with lab simulation and obtain two kinds, the scene obtains exactly in annotating collecting process by the sampling of drill sampling well or annotates nitrogen at injection well and return row's sampling (Geng Yuguang, Li Shanwei, Weng Yanping etc. the guiding experimental study of North China Oilfield tertiary oil recovery [J]. drilling technology .1998; Zhang Zhen China etc. the on-the-spot pilot test technology [M] of polymer displacement of reservoir oil. Beijing: the on-the-spot pilot test technology of polymer displacement of reservoir oil, 1996:207; Wang Youqi, Zhang Yigen, Jiang Yanbo etc. several problems [J] of impact polymer mining site implementation result. oilfield chemistry .1999:244-246.); The indoor solution property that can only obtain by simulation shearing after shear its near wellbore zone to polymer solution, the accuracy of simulation cutting method directly has influence on the selection of each parameter in oil reservoir programming, the reasonability of dynamically following the tracks of and implementing to predict and the accuracy numerical simulation process, and poly-development effectiveness is annotated in final influence.At present, shear the polymer solution Effect on Performance desk research near wellbore zone, main employing WARING agitator (Zhang Qunzhi, Zhao Wenqiang, Chen Suping etc. different cut modes are to the influence [J] of polymer solution and gelling performance. oilfield chemistry .2008:256-260; China National Offshore Oil Corporation's technical standard. the offshore oilfield displacement of reservoir oil acrylic amide salt tolerant polymer properties index and detection method [S]. China National Offshore Oil Corporation, 2006.), rock core pressure reduction shear (China National Offshore Oil Corporation's technical standard. the offshore oilfield displacement of reservoir oil is with acrylic amide salt tolerant polymer properties index and detection method [S]. China National Offshore Oil Corporation, 2006; Yang Huaijun, Zhang Jie, Zhang Jingchun. association polymer solution core shear rheology behavioral study [J]. the journal .2007:102-105 of Southwest Petrol University; China National Petroleum Corporation's technical standard. displacement of reservoir oil acrylamide copolymer performance measurement [S]. China National Petroleum Corporation (CNPC), 1993:1994-1-6.), capillary tube shears (Zhou Haigang, Du Canmin, punishment will army. analog study [J] .2003:247-249 that polymer is degraded in annotating poly-pipeline; China National Petroleum Corporation's technical standard. the displacement of reservoir oil is with acrylamide copolymer performance measurement [S]. China National Petroleum Corporation (CNPC), 2007.) etc. method study.Utilize the WARING agitator to shear polymer solution and be actually pure mechanical shearing, because the difference of cut mode and stratum filtration cut mode, so it can not truly reflect the actual conditions that are sheared when polymer solution enters the stratum.The method that rock core is sheared is to utilize injection pump to make polymer solution in the intermediate receptacle by the core holding unit of simulation rock core is housed, thereby realizes the shearing to polymer solution; The equipment that this method needs mainly comprises injection pump, intermediate receptacle, parts such as core holding unit, can be sheared later solution property by simulating polymer solution to a certain extent, but this method operates more loaded down with trivial details because shear rate is discontinuous variation, the shearing of certain point can not be simulated shearing and other effects to polymer that flow velocity continuous acute variation near wellbore zone causes in can only simulated formation, does not neither also allow on the economic time for large batch of laboratory experiment.Capillary tube is sheared owing to be the mobile generation of polymer in capillary tube inside, its flow regime is pipe stream, different with the flow regime of stratum filtration, cut mode is also different with the stratum filtration shearing, so it can not truly reflect the actual conditions that are sheared when polymer solution enters the stratum.
To sum up, existing simulation cutting method there are differences in many-sides such as cut mode, shear distance, shear strength, shearing medium and actual conditions, cause existing evaluation method can not well estimate the near wellbore zone and shear the influence that the polymer solution performance is produced, therefore in the lab simulation process, have limitation.
Summary of the invention
The purpose of this utility model provides a kind of near wellbore zone analogue means that can be at aspects such as cut mode, shear distance, shear strength, shearing media all coincide with actual conditions, realize the variation of shear strength and shear distance by the variation of device shape, by adopting same or analogous percolating medium to realize the unanimity of cut mode, make the near wellbore zone seepage environment of simulating more near actual conditions.
A kind of near wellbore zone that the utility model provides is sheared analogue means and is comprised the multistage cylindrical tube of being made up of at least two not isometrical cylindrical tubes; Described multistage cylindrical tube is provided with seal cover A and seal cover B; Described seal cover A is positioned at the described cylindrical tube end of the first order, is respectively equipped with sealed tube wire terminal a and sealed tube wire terminal b on described seal cover A and the seal cover B; Be provided with the circle ring column of interference fit with it in the described cylindrical drum body cavity of the first order; Be provided with glued sand body between the soffit of described circle ring column and the described seal cover B, be provided with cylindrical hole in the described glued sand body with the intracavity inter-connection of described circle ring column.
Above-mentioned analogue means, described seal cover A are with described multistage cylindrical tube with seal cover B that thread seal is connected or interference fit, for described multistage cylindrical tube plays sealing function.Described seal cover A and seal cover B all can be made by the material of energy bearing certain pressure.
Above-mentioned analogue means, described seal cover A is that thread seal is connected or interference fit with described sealed tube wire terminal a, described sealed tube wire terminal a can closely be connected so that fluid course to be provided with indoor displacement pipeline.
Above-mentioned analogue means, described seal cover B is that thread seal is connected or interference fit with described sealed tube wire terminal b, described sealed tube wire terminal b can closely be connected so that fluid course to be provided with indoor displacement pipeline.
Above-mentioned analogue means, described multistage cylindrical tube is provided with at least one sample tap; Described sample tap is provided with seal cover C; Described seal cover C is that thread seal is connected or interference fit with described multistage cylindrical tube.Displacement working solution sample can be obtained by described sample tap, thereby its pressure and other parameters can be tested.Obsolete the time, can use seal cover C to seal the passage of described sample tap.
Above-mentioned analogue means, the number of described sample tap can be regulated as required.
Above-mentioned analogue means, described circle ring column can be annulus cement column, annulus stainless steel cylinder or annulus alloy steel cylinder; The height of described circle ring column is less than the height of the described cylindrical tube of the first order; The described cylindrical tube of the soffit of described circle ring column and the first order overlaps with the interface of the described cylindrical tube in the second level.The thickness of described circle ring column can adopt bit size and hole enlargement situation thereof to determine according to actual casing size and drilling well, the interior ring diameter of described circle ring column and the perforating bullet model of realistic objective well coupling.
Above-mentioned analogue means, the diameter of described cylindrical hole is more than or equal to the interior ring diameter of described circle ring column; The height of described cylindrical hole is less than the height of described glued sand body.Described cylindrical hole is used for the analogue perforation borehole, and ring diameter and highly depending on is intended the perforating bullet model parameter simulated in it.
Above-mentioned analogue means, the permeability of described glued sand body, degree of porosity are consistent or close with the stratum relevant parameter of target well, and the material that is adopted can be the sand of appearing, quartz sand, glass microballoon or haydite etc.
Above-mentioned analogue means, the diameter of described multistage cylindrical tube increases successively from described seal cover A end to described seal cover B end.
Shearing analogue means of the present utility model has been owing to adopted above technical scheme, can analog operation liquid when the stratum filtration of near wellbore zone because the percolating medium that causes apart from the variation of wellbore centre distance and the variation of seepage velocity; Can simulate because the cut mode that the variation of percolating medium causes changes; Can simulate the near wellbore zone and shear the polymer solution changes of properties that causes.The shearing analogue means that the utility model provides can be widely used in oilfield chemistry and drive in the raising recovery ratio technology.
Description of drawings
Fig. 1 is the overall structure schematic diagram that analogue means is sheared near wellbore zone of the present utility model.
The specific embodiment
The utility model is described in further detail below in conjunction with accompanying drawing, but the utility model is not limited to following examples.
Analogue means is sheared as shown in Figure 1 near wellbore zone of the present utility model, each mark is as follows among the figure: 1 sealed tube wire terminal a, 2 seal cover A, 3,12,13 cylindrical tubes, 4 sample taps, 5 perforate sleeve pipes, 6 annulus cement columns, 7 cylindrical holes, 8 seal cover C, 9 glued quartz sand bodies, 10 seal cover B, 11 sealed tube wire terminal b.
Shearing analogue means of the present utility model comprises three grades of cylindrical tubes, these three grades of cylindrical tubes comprise first order cylindrical tube 3, second level cylindrical tube 12 and third level cylindrical tube 13, the diameter of cylindrical tube 3, cylindrical tube 12 and cylindrical tube 13 increases successively, is used to provide the seepage channel of radial variations; These three grades of cylindrical tubes are provided with seal cover A2 and seal cover B10, are used for these three grades of cylindrical tubes are played sealing process; Seal cover A2 and seal cover B10 make by stainless steel; Seal cover A2 and seal cover B10 all are tightly connected by screw thread and this three grades of cylindrical tubes; Seal cover A2 is provided with sealed tube wire terminal a1, and seal cover A2 is connected by thread seal with sealed tube wire terminal a1, is used for closely being connected so that fluid course to be provided with indoor displacement pipeline; Seal cover B10 is provided with sealed tube wire terminal b11, and seal cover B10 is connected by thread seal with sealed tube wire terminal b11, is used for closely being connected so that fluid course to be provided with indoor displacement pipeline; These three grades of cylindrical tubes are provided with 3 sample taps 4, in needs, can be communicated with these three grades of cylindrical tubes extraneous, carry out performance test thereby obtain working solution; Sample tap 4 is provided with seal cover C8, can seal the passage of sample tap 4 obsolete the time with seal cover C8; Be provided with the annulus cement column 6 with cylindrical tube 3 interference fit in the cylindrical tube 3, the soffit of annulus cement column 6 and cylindrical tube 3 overlap with the interface of cylindrical tube 12, and the height of annulus cement column 6 is less than the height of cylindrical tube 3; Annulus cement column 6 is provided with perforate sleeve pipe 5, and the perforate size of perforate sleeve pipe 5 equates with the interior ring diameter of annulus cement column 6; Be provided with glued quartz sand body 9 between the soffit of annulus cement column 6 and the seal cover B10, the permeability of glued quartz sand body 9, degree of porosity are consistent with the stratum relevant parameter of target well; Be provided with the cylindrical hole 7 with the intracavity inter-connection of annulus cement column 6 in the glued quartz sand body 9, be used for the analogue perforation borehole, the diameter of cylindrical hole 7 equates that with the interior ring diameter of annulus cement column 6 height of cylindrical hole 7 is less than the height of glued quartz sand body 9.
In the above-mentioned shearing analogue means of the present utility model, the material of seal cover A2 and seal cover B10 can also be can bearing certain pressure glass fiber reinforced plastic; Seal cover A2 and seal cover B10 can also be tightly connected by interference fit and this three grades of cylindrical tubes; Seal cover A2 can also be connected by interference fit seal with sealed tube wire terminal a1; Seal cover B10 can also be connected by interference fit seal with sealed tube wire terminal b11; The number of sample tap 3 can be regulated as required, and seal cover C8 can also be tightly connected by interference fit and this three grades of cylindrical tubes.Annulus cement column 6 can also be annulus stainless steel cylinder or annulus alloy steel cylinder; The interior ring diameter of annulus cement column 6 and the diameter of cylindrical hole 7 all can be regulated according to the perforating bullet model of realistic objective well; The diameter of cylindrical hole 7 can be greater than the interior ring diameter of annulus cement column 6; Glued quartz sand body 9 can also be gluing appear sand body, glued glass microballoon or glued haydite etc., and its permeability, degree of porosity can be close with the stratum relevant parameter of target well.
When using shearing analogue means of the present utility model, sealed tube wire terminal a1 closely is connected with indoor displacement pipeline, the displacement working solution is entered in the multistage cylindrical tube.The displacement working solution is gone into the cylindrical hole 7 from the interior circulation of cylinder cement ring body 6, then seepage flow radially in glued quartz sand body 9; When need measure, obtain the displacement working solution from sample tap 3 and carry out performance test the performance of displacement working solution; Displacement working solution after test finishes can be discharged this three grades of cylindrical tubes from sealed tube wire terminal b11.
Claims (9)
1. analogue means is sheared in a near wellbore zone, and it is characterized in that: described device comprises the multistage cylindrical tube of being made up of at least two not isometrical cylindrical tubes; Described multistage cylindrical tube is provided with seal cover A and seal cover B; Described seal cover A is positioned at the described cylindrical tube end of the first order, is respectively equipped with sealed tube wire terminal a and sealed tube wire terminal b on described seal cover A and the seal cover B; Be provided with the circle ring column of interference fit with it in the described cylindrical drum body cavity of the first order; Be provided with glued sand body between the soffit of described circle ring column and the described seal cover B, be provided with cylindrical hole in the described glued sand body with the intracavity inter-connection of described circle ring column.
2. analogue means according to claim 1 is characterized in that: described seal cover A is with described multistage cylindrical tube with seal cover B that thread seal is connected or interference fit.
3. analogue means according to claim 1 and 2 is characterized in that: described seal cover A is that thread seal is connected or interference fit with described sealed tube wire terminal a.
4. analogue means according to claim 1 and 2 is characterized in that: described seal cover B is that thread seal is connected or interference fit with described sealed tube wire terminal b.
5. analogue means according to claim 1 and 2 is characterized in that: described multistage cylindrical tube is provided with at least one sample tap; Described sample tap is provided with seal cover C.
6. analogue means according to claim 5 is characterized in that: described seal cover C is that thread seal is connected or interference fit with described multistage cylindrical tube.
7. analogue means according to claim 1 and 2 is characterized in that: described circle ring column is annulus cement column, annulus stainless steel cylinder or annulus alloy steel cylinder; The height of described circle ring column is less than the height of the described cylindrical tube of the first order; The described cylindrical tube of the soffit of described circle ring column and the first order overlaps with the interface of the described cylindrical tube in the second level.
8. analogue means according to claim 1 and 2 is characterized in that: the diameter of described cylindrical hole is more than or equal to the interior ring diameter of described circle ring column; The height of described cylindrical hole is less than the height of described glued sand body.
9. analogue means according to claim 1 and 2 is characterized in that: the diameter of described multistage cylindrical tube increases successively from described seal cover A end to described seal cover B end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020678955XU CN201982088U (en) | 2010-12-14 | 2010-12-14 | Near-wellbore region shearing stimulator with multiple-stage cylindrical shell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020678955XU CN201982088U (en) | 2010-12-14 | 2010-12-14 | Near-wellbore region shearing stimulator with multiple-stage cylindrical shell |
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| Publication Number | Publication Date |
|---|---|
| CN201982088U true CN201982088U (en) | 2011-09-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201020678955XU Expired - Lifetime CN201982088U (en) | 2010-12-14 | 2010-12-14 | Near-wellbore region shearing stimulator with multiple-stage cylindrical shell |
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| CN (1) | CN201982088U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102042012A (en) * | 2010-12-14 | 2011-05-04 | 中国海洋石油总公司 | Multistage-cylinder near well-bore zone shearing simulation device |
-
2010
- 2010-12-14 CN CN201020678955XU patent/CN201982088U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102042012A (en) * | 2010-12-14 | 2011-05-04 | 中国海洋石油总公司 | Multistage-cylinder near well-bore zone shearing simulation device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 100010 Beijing, Chaoyangmen, North Street, No. 25, No. Patentee after: China National Offshore Oil Corporation Patentee after: CNOOC Research Institute Patentee after: Southwest Petroleum University Address before: 100010 Beijing, Chaoyangmen, North Street, No. 25, No. Patentee before: China National Offshore Oil Corporation Patentee before: CNOOC Research Center Patentee before: Southwest Petroleum University |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20110921 Effective date of abandoning: 20140716 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20110921 Effective date of abandoning: 20140716 |
|
| RGAV | Abandon patent right to avoid regrant |